Typewriter support



C. B. CORCORAN.

T'YPEWRITER' SUPPORT. APPLICATION Fl LED APR.2I, 1920.

PatentedJune 6, 1922.

lNVElNTOR the invention is to provide a support which UNETEEQ @FMQE."

CORNELIUS B. CORCORAN, OF NEW YORK, N. Y., ASSIGNOR TO 'UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

'rvrnwnrrnr. snrron'r.

aerator.

Specification of Letters Patent.

Patented June 6, 1922.

Application filed April 21, 1920. Serial No. 375,491.

T 0 all to ham it may concern:

Be it known that I, CORNELIUS B. Conco- RAN, a citizen of the United States, residing in borough of the Bronx, in the county of the Bronx, city and State of New York, have invented certain new and useful Improvements in Typewriter Supports, of which the following is ,a specification.

This invention relates to supports for typewriters and the like, and an object of is lighter than supports now in use, yet of suflicient strength to rigidly support the typewriter when mounted thereon; and also a support that will reduce the noise of the typewriter, to a marked degree. 7

In the early days of the typewriting machine, when the universal practice was to stand a machine on .the top of an open desk or table, it was found that the top of the desk or table acted as a sounding board or resonator and by its vibrations increased to a considerable extent the noise of operation of the machine. In an attempt to overcome this trouble, various kinds of resilient contrivances were interposed between the machine and the table top or desk top upon which it rested, but the results were far from satisfactory, as the table or desk top would still vibrate as a noise-producing resonator.

In more recent practice, in which the typewriter has been supported on a solid board located within a well in a typewriter desk, such board being at a lower level than thetop of the desk,;it was found that the noise of operation of the machine was further augmented, by reason of the fact that the typewriter-supporting board proved'a better resonator than the top of an ordinary table or desk. and also by reason of the further fact thatthe well acted to concentrate thesound which would be reflected upwardly by the solid board directly into the face of the. typist.

. The recent general practice has been to hinge a solid typewriter-supporting board in the well of the desk, the typewriter being. secured on the top of this board, and

to connect this board to a swinging part of the top of. the desk in such manner that the hinged board and the typewriting machine thereon will be raised or lowered whenthe movable part of the desk top is pushed rearwardly or drawn forwardly.

The present invention does away entirely with the above-noted solid resonantly-vibrating and sound-reflecting board. According to the present invention,gthe typewrltmg machine is supported upon and secured to an open framework or skeletonframe mounted in the usual well of the typewriter desk, this skeleton-frame being free from resonance .and also providing large open spaces through which the sound from the machine may escape and be dissipated downwardly, the well in the desk being freely open below the open framework or skeleton-frame which supports the machine.

Also commonly heretofore theconnecting means employed forsecuring the typewriting machine in place upon its'supporting board in the well of the desk have been according to the present invention, the

-means for connecting the machine to the open framework comprise rubber plugs seated in the framework and through which headed metal screws pass upward and screw into the frame of the typewriting machine.

A further point to be noted in this connection is that the solid board heretofore employed for supporting the typewriting machine adds considerable weight, which has to be moved in raising and lowering the machine, whereas the open framework of the present invention is very much lighter.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a side elevation of a typewriter and support, portions .of the support being in section.

Figure 2 is a perspective view of a desk withthe improved support attached thereto.

Figure 3 is a top plan view of the support.

Figure 4 is a detail, showing the means of attaching the typewriter to the support.

bars or members 1 connected by a cross-bar or member 2, which may be secured to the side members in any suitable or well-known manner, as for instance by mortising. A second cross-bar or member 3 is also provided in spaced relation rearward from the front cross-bar 2. 1

Typewrites are usually provided with feet of rubber, and these are shown at 4, in Figure 1, said feet being secured to the type writer framework by means of screws 5, which are countersunk in the rubber feet, so that the feet alone (and not the screws) sustain the weight of the machine. When the typewriter is in place on the open skele ton-frame, the rubber feet occupy the posi tions 011 the cross-bars 2 and 8 indicated at 4 in Figure 3. Devices for firmly securing the typewriter to the open skeleton-frame are provided in the form of metal bolts 6, which may en gage a threaded lug portion 7 of the typewriter frame. These bolts pass through spaced perforated sound-insulating plugs 8, said plugs being preferably of rubber, and set into the member 2 of the frame. Each plug 8 is inserted from below into a hole through the front cross-bar 2, said hole being of reduced diameter at the top to form aninterior seat against which rests an annular shoulder formed on the plug 8, as shown in Figure f. A check-nut 9 may be provided to secure the bolts 6 in place. The skeletonframe is hinged to the front portion of the desk at 10, and is connected to the movable top part 11 of the desk by any suitable or well-known means (not shown).

In carrying out the present invention, it is to be noted that there is nowhere present in the well of the typewriter desk beneath the typewriting machine any solid board which, if present, would act both as a soundamplifying resonator and a sound-reflector. In accordance with the present invention, the typewriting machine is not, as has heretofore been common, secured upon a solid board to which the vibrations of the machine are communicated, thereby to cause the vibrating board itself to produce a loud noise independently of and in addition to the noise produced in the machine itself. Furthermore, in accordance with the present invention, the entire space in the well of the desk beneath the skeleton-frame is left freely open, for if there were a solid board in this space, particularly in proximity to board.

the typewriting machine, such board would act both as a sound-amplifying resonator and as a sound reflector, to augment the noise of operation of the machine. Obviously, the typewriter-supporting skeletonframe, comprising the slender side bars 1 and the slender cross-bars 2 and 3, is incapable of functioning as a resonating The slender bars 1, 2 and 3 offer no substantial obstacle to the passage of noise from the machine itself, and this noise may be freely dissipated in a downward direction.

By reason of the fact that all of the points of contact between the typewriter and the skeletonframe are made through the medium of soft resilient sound-insulating material, the noise of the typewriter is further reduced.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. The combination, in a typewriter-desk having in the front and top thereof an open well extending vertically through the desk,

of a typewriter-supporting open skeletonframe carried by the desk within the well below the level of the top of the desk, the well being left freely open through the desk below said skeleton-frame whereby the vibrations produced in operating the machine cannot result in noise-producing resonance in the means for supporting the machine, and also so that the noise produced in the machine itself can freely escape downwardly through the openings in said skeleton-frame and be dissipated.

2. In combination, a typewriter-desk having in the front and topthereof an open well extending vertically through the desk, an 0 en skeleton-frame carried by the desk within the well below the level of the top of the desk, a typewriting machine upon said open skeleton-frame, whereby the noise of operation of the machine may freely escape and be dissipated downwardly through the openings in said skeleton-frame, and also whereby the means for supporting the machine will be unable to respond resonantly to the vibrations of operation of the machine, soft resilient feet to sustain the weight of the typewriting machine and support it upon said open skeleton-frame,

and connections for attaching the type- Writing machine to said open skeletonframe, said connections having soft resilient material included therein to form a part thereof, whereby vibrations of the machine communicated to said open skeleton-frame will be minimized, for thereby further reducing the noise of operation of the machine.

3. The combination with a typewriter having soft resilient feet, of a typewriter-s11 porting open skeleton-frame having parzil lel side bars and a plurality of cross-bars connecting the side bars, said typewriter resting on the cross-bars with said feet only in contact therewith, one of said cross-bars having a hole through it, said hole being reduced at the top to form an interior seat, a perforated plug of soft resilient material inserted into said hole from the bottom to rest against said seat, a metallic fastening device passing through said plug and engaging the typewriter to secure it to said skeleton-frame, and means for supporting said side bars to support the skeleton-frame.

I 4. In a combined typewriter and support,

the combination with a typewriter having rubber feet and countersunk metallic means securing said feet to the frame of the typewriter, of an open frame having parallel sides, cross-bars connecting said sides, said feet resting on the cross-bars with the rubber only in contact with the frame one of said cross-bars having spaced perforated plugs of rubber inserted therein, metallic devices passing through said plugs and engaging the typewriter to fasten it to the frame.

CORNELIUS B. CORCORAN. Witnesses:

EDITH B. LIBBEY, JENNIE P. Tnonnn.

and 15 

